US4846900AExpiredUtility
Process for the production of a compresssed gas container made of austenitic steels by cryodeformation
Est. expiryAug 13, 2007(expired)· nominal 20-yr term from priority
B21D 26/041B21D 26/049C21D 6/04C21D 7/12
40
PatentIndex Score
5
Cited by
4
References
1
Claims
Abstract
The invention relates to a process for producing a compressed gas container made of austenitic steels by cryodeformation in which the container is cooled by a refrigerated cooling medium to below the prevailing martensite transformation temperature and is expanded to the desired size by the introduction of a pressure medium into the container. Trichlorofluoromethane is employed as the pressure medium.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1. In a process for the production of a compressed gas container made of austenitic steels by cryodeformation including the steps of cooling the compressed gas container in liquid nitrogen to below the prevailing martensite transformation temperature and expanding the container to the desired size by introducing a pressure medium into the container, the improvement being in that trichlorofluoromethane (CFCL 3 ) is introduced as the pressure medium.Join the waitlist — get patent alerts
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